diff --git a/requirements-build.txt b/requirements-build.txt
index 8d20ee8b..ca273a94 100644
--- a/requirements-build.txt
+++ b/requirements-build.txt
@@ -1,4 +1,5 @@
 # minimum needed to build jupytergis.
 datamodel-code-generator>=0.23.0
 hatchling>=1.5.0,<2
+jupyterlab>=4,<5
 pydantic==2.4.2